Osmium(II) chloride or osmium dichloride is an inorganic compound composed of osmium metal and chlorine with the chemical formula .
Synthesis Osmium(II) chloride can be prepared by disproportionation of osmium(III) chloride at 500 °C in vacuum:
Uses Osmium(II) chloride can be used for the catalytic production of trialkylamines.
Reactions Osmium(II) chloride reacts with carbon monoxide at 220 °C:
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